Good luck and thanks for doing the job!
Interesting. This seems to be the first case (at least in the last two years) where the same post is present in both. I'm curions about the votes. Should give some feedback about the relative share of readers of Main and Discussion.
It's not a good test unless the post gets promoted. I'm willing to bet that a lot of people check the promoted posts at Main, but don't bother to check New.
Also, some people might be sufficiently in favor to upvote both posts.
Viliam Bur made the announcement in Main, but not everyone checks main, so I'm repeating it here.